Fixes #7274, #8476.  On mousedown in IE, remove previous saved cursor position, and additionally set the cursor to the end if the event was to empty space.
Fixes #7274, #8476.  On mousedown in IE, remove previous saved cursor position, and additionally set the cursor to the end if the event was to empty space.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@16555 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful